3.0 CONFIGURATION
This section describes the location and orientation of the Model
222NRC's configuration jumpers, provides detailed instructions on
setting each jumper, and describes the settings for each of the rear
connection cards.
The Model 222NRC uses two jumpers that allow configuration to a
wide range of asynchronous applications. These jumpers are
accessible when the card is slid out of the rack chassis (see Figure 1,
below). Once the hardware is configured, the Model 222NRC is
designed to operate transparently, without need for frequent re-
configuration: just set it and forget it!
3.1 JUMPER LOCATIONS AND ORIENTATION
The configuration jumpers on the Model 222NRC board and the
rear interface card allow you to configure the function of both front
panel “Carrier Detect” LEDs, as well as the rear interface card CD
signal. Figure 2 (below) shows the orientation of these jumpers. Notice
that each jumper can either be on pegs 1 and 2, or on pegs 2 and 3.
Note: Pin 1 is always located on the top or left side of the jumper set.
2.0 GENERAL INFORMATION
Thank you for your purchase of this Patton Electronics product.
This product has been thoroughly inspected and tested and is
warranted for One Year parts and labor. If any questions or problems
arise during installation or use of this product, please do not hesitate to
contact Patton Electronics Technical Support at (301) 975-1007.
2.1 FEATURES
• Convenient rack card features two interface converters
• Data rates to 19.2 Kbps over two twisted pair
• RTS and CTS are looped on the RS-232 interface
• Bidirectional conversion between unbalanced RS-232 and
balanced RS-422 interfaces
• Carrier detect LEDs can be customized
• Silicone Avalanche Diode surge protection
• Fits conveniently in Patton’s rack chassis
• Made in USA
2.2 DESCRIPTION
The Model 222NRC Interface Converter Rack Card is a dual
rack card incorporating two converters. The converters let computers,
terminals and modems using the RS-232 interface communicate with
devices using RS-422 balanced electrical signals. Both units operate
full duplex at data rates to 19.2 Kbps over 2 twisted pairs. The Model
222NRC features 13 easy-to-read front panel LEDs, which monitor the
status of data transmission. As an added feature, a set of easily
accessible configuration straps allows the user to control the function of
the carrier detect LEDs.
The Model 222NRC uses the latest surface mount technology to
attain high quality short range modem performance in a convenient
rack card. Filling one function card slot on Patton’s R16P rack chassis,
two Model 222NRCs are available with RJ-11 or RJ-45 rear interface
cards. For workgroup and desktop communications, the Model
222NRC also fits in Patton’s 2, 4 and 8 slot Cluster Boxes. The
combination of rack mount, Cluster Box and interface powered units
provides a completely integrated “networking” solution.
3
Figure 1. Model 222NRC card, showing location of configuration jumpers
Figure 2. Orientation of interface card straps
1
2
3
1
2
3
1
2
3
JP1-A
JP1-B
ON
ON
Normal
Normal
4
1
2
3
1
2
3
